/**
 * MIT License
 *
 * Copyright (c) 2024 小村程序员
 * Email: 397237738@qq.com
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.open.cobertura.agent;

import org.open.cobertura.core.instrument.CoberturaInstrument;
import org.open.cobertura.params.AbstractAgentBuilder;
import org.open.cobertura.params.AgentBuilder;

import java.lang.instrument.ClassFileTransformer;
import java.security.ProtectionDomain;
import java.util.List;

/**
 * 修改字节码
 */
public class CoberturaTransformer implements ClassFileTransformer {
    AbstractAgentBuilder abstractAgentBuilder;

    /**
     * 对字节码进行转换
     * @param agentArgs
     */
    public CoberturaTransformer(String agentArgs) {
        abstractAgentBuilder=new AgentBuilder();
        abstractAgentBuilder.parseAgentArgs(agentArgs);
    }

    @Override
    public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classBuffer) {

        if(abstractAgentBuilder.isExclude(className)){
            return classBuffer;
        }else if(abstractAgentBuilder.isInclude(className)){
            return modifyClass(classBuffer,className);
        }
        return classBuffer;
    }
 
    private byte[] modifyClass(byte[] classBuffer,String className) {
        CoberturaInstrument coberturaInstrument=new CoberturaInstrument();
        return coberturaInstrument.instrument(classBuffer,className);
    }
}